Vial adapter



FIG. 1 is a front perspective view of a vial adapter;

FIG. 2 is a front view of the vial adapter;

FIG. 3 is a rear view of the vial adapter;

FIG. 4 is a right side view of the vial adapter;

FIG. 5 is a left side view of the vial adapter;

FIG. 6 is a top view of the vial adapter;

FIG. 7 is a bottom view of the vial adapter; and,

FIG. 8 is a rear perspective view of the vial adapter.

The evenly spaced broken lines shown in the drawings depict portions of the vial adapter that form no part of the claimed design. 

CLAIM The ornamental design for a vial adapter, as shown and described. 